Aeon Wurm

Suspend 4-{6}{w}{u}{b}{g} You can suspend Aeon
Wurm from the command zone.
During each opponent's upkeep they add or
remove a time counter from Aeon Wurm while
it's exiled. If they put a time counter on it, they
lose life equal to the number of time counters on
it and you gain life equal to the life lost this way.
If they remove a time counter from it, they
discard a card at the end of their draw step and
you draw a card.